How low to mount doors?

Good Morning
Quick question. I am using premade Challenger doors (which are nice BTW) for a teardrop build and at the point of cutting my inner wall template. If we are using a 6 inch mattress, what's the consensus on how much mattress needs to be above the door frame so the door frame wont dig into the back of your leg when sitting down to get in and out of the tear?
Thanks in Advance
Mike
Quick question. I am using premade Challenger doors (which are nice BTW) for a teardrop build and at the point of cutting my inner wall template. If we are using a 6 inch mattress, what's the consensus on how much mattress needs to be above the door frame so the door frame wont dig into the back of your leg when sitting down to get in and out of the tear?
Thanks in Advance
Mike